There is provided an image display device that includes a display in which a background is transparently seen from a front surface side, and has a high degree of freedom at the time of installation. A liquid crystal panel (32) for adjusting transparency/light-emission adjusts, for each pixel, a ratio between transmitted light-source light and ambient light by respectively controlling a polarization direction of a reflected polarization component of the light-source light irradiated to a reflection-type polarization plate (20) from a light guide plate (180) and a polarization direction of a transmitted polarization component of the ambient light incident to the reflection-type polarization plate (20) from a rear surface side of the display, based on transparent/light-emitting pixel information. Accordingly, when the image display device is viewed from the front surface side of the display, an image is seen for each pixel, a background is transparently seen, or the background is seen so as to be superimposed on the image. Since it is not necessary to attach the image display device to a case filled with light, the image display device is widely used without limitation of use.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. An image display device capable of performing transparent display in which a background is transparently seen from a front surface side of a display, the device comprising: a light-source light/ambient light adjuster which includes a pixel array in which a plurality of pixels is arranged, controls a polarization direction of light for each pixel in response to an image signal applied from outside, and transmits light having a desired polarization component to the front surface side of the display; a polarization component selector which is disposed closer to a rear surface side than the light-source light/ambient light adjuster, selects one polarization component of ambient light incident from a rear surface side of the display to transmit the selected polarization component of the ambient light, selects a component of polarization components of light-source light incident from the front surface side of the display which is perpendicular to the polarization component of the ambient light to reflect the selected component of the light-source light, and guides the polarization components of the ambient light and the light-source light to the light-source light/ambient light adjuster; and a light-source light irradiator which is disposed closer to the front surface side than the polarization component selector, and irradiates the light-source light toward the rear surface side of the display, wherein the image signal includes transparent/light-emitting pixel information for determining a ratio of transmission at which the ambient light which is incident from the rear surface of the display and is selected by the polarization component selector and the light-source light which is irradiated from the light-source light irradiator is selected by the polarization component selector transmit through the light-source light/ambient light adjuster, and the light-source light/ambient light adjuster adjusts, for each pixel, a ratio at which the light-source light and the ambient light transmit by respectively controlling the polarization component of the ambient light selected by the polarization component selector and the polarization component of the light-source light selected by the polarization component selector, based on the transparent/light-emitting pixel information.
The image display device shows a transparent image, letting you see the background behind it. It has a light/ambient light adjuster with a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front. A polarization component selector is behind this, letting ambient light from the back pass through with a specific polarization. It also reflects source light (from a light source) with polarization perpendicular to the ambient light and sends both types of light to the adjuster. A light source is positioned in front of the component selector and shines light toward the back. The image signal tells each pixel the ratio of ambient light and source light to transmit through the light/ambient light adjuster by controlling polarization components.
2. The image display device according to claim 1 , wherein the polarization component selector includes a reflection-type polarization plate that transmits polarization components of the ambient light and the light-source light which have an identical polarization direction as a transmission axis direction, and reflects polarization components which have an identical polarization direction as a reflection axis direction, and the light-source light irradiator is disposed in a space interposed between the light-source light/ambient light adjuster and the reflection-type polarization plate or near the space, and irradiates the light-source light to the reflection-type polarization plate.
The image display device from the previous description employs a reflection-type polarization plate as the polarization component selector. This plate transmits ambient and source light with the same polarization direction as its transmission axis and reflects light polarized along its reflection axis. The light source is placed between the light/ambient light adjuster and the polarization plate, or close by, shining light onto the polarization plate. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display.
3. The image display device according to claim 1 , further comprising: a first absorption-type polarization plate that is disposed closer to the front surface side of the display than the light-source light irradiator; and a second absorption-type polarization plate that is disposed close to a front surface side of the light-source light/ambient light adjuster, and causes the polarization direction of the light-source light or the ambient light transmitted through the light-source light/ambient light adjuster to be in line with a polarization direction of the first absorption-type polarization plate, wherein the polarization component selector includes a reflection-type polarization plate that transmits polarization components of the ambient light and the light-source light which have an identical polarization direction as a transmission axis direction, and reflects polarization components which have an identical polarization direction as a reflection axis direction, the light-source light irradiator is disposed in a space interposed between the first absorption-type polarization plate and the second absorption-type polarization plate or near the space, and irradiates the light-source light to the second absorption-type polarization plate, and the first absorption-type polarization plate transmits at least any one of the light-source light and the ambient light transmitted through the second absorption-type polarization plate to the front surface side of the display, and absorbs light-source light which has leaked to the front surface side, of the light-source light irradiated from the light-source light irradiator.
The image display device from the first description adds a first absorption polarization plate in front of the light source and a second absorption polarization plate close to the front of the light/ambient light adjuster. The second plate aligns the polarization of source or ambient light passing through the adjuster with the first plate's polarization. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light with polarization along its reflection axis. The light source is positioned between the first and second absorption plates, shining light onto the second plate. The first absorption plate transmits at least some source or ambient light to the front, while absorbing any leaked source light. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display.
4. The image display device according to claim 1 , wherein the light-source light irradiator includes a light source that emits the light-source light including a plurality of polarization components having different polarization directions, the polarization component selector includes a polarization component selecting sheet that reflects the light-source light to the front surface side of the display at an angle different from an incident angle, a first polarization component selecting polarization plate that is disposed close to a rear surface side of the polarization component selecting sheet, and transmits polarization components having a specific polarization direction, of the ambient light incident from the rear surface side of the display, and a second polarization component selecting polarization plate that is disposed on a surface of the light source, and transmits a polarization component having a polarization direction, which is perpendicular to the specific polarization direction, of the light-source light emitted from the light source, and the light source is disposed near a space interposed between the light-source light/ambient light adjuster and the polarization component selecting sheet, and irradiates the polarization components of the light-source light, which have transmitted through the second polarization component selecting polarization plate, to the polarization component selecting sheet.
The image display device from the first description has a light source that emits light with multiple polarization directions. The polarization component selector uses a sheet that reflects source light at a different angle than it arrives. A first polarization plate is behind this sheet, transmitting ambient light with a specific polarization. A second polarization plate sits on the light source, transmitting source light with polarization perpendicular to the ambient light's polarization. The light source is near the space between the light/ambient light adjuster and the reflection sheet, shining polarized source light onto that sheet. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display.
6. The image display device according to claim 1 , further comprising: a transmittance adjuster which is disposed close to a front surface sided of the light-source light/ambient light adjuster, and adjusts transmittances of the light-source light and the ambient light transmitted through the light-source light/ambient light adjuster; and a first absorption-type polarization plate that is disposed close to a front surface side of the transmittance adjuster, wherein the polarization component selector includes a reflection-type polarization plate that transmits polarization components of the ambient light and the light-source light which have an identical polarization direction as a transmission axis direction, and reflects polarization components having an identical polarization direction as a reflection axis direction, the light-source light irradiator is disposed in a space interposed between the light-source light/ambient light adjuster and the reflection-type polarization plate or near the space, and irradiates polarization components of the light-source light which have a polarization direction perpendicular to a specific polarization direction to the reflection-type polarization plate, and the transmittance adjuster transmits polarization components of at least any one of the light-source light and the ambient light to the front surface side of the display by adjusting, for each pixel, transmittances of pixels through which polarization components of the light-source light and the ambient light extracted by the light-source light/ambient light adjuster transmit, based on transmittance pixel information which sets the transmittance for each pixel.
The image display device from the first description includes a transmittance adjuster close to the front of the light/ambient light adjuster, which modifies how much light passes through. There's also a first absorption polarization plate in front of the transmittance adjuster. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light with polarization along its reflection axis. The light source is located between the light/ambient light adjuster and the polarization plate, or close by, and shines polarized source light (perpendicular to a specific polarization) onto the polarization plate. Based on transmittance pixel information, the transmittance adjuster adjusts the amount of light passing through each pixel, sending at least some source or ambient light to the front. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display.
7. The image display device according to claim 6 , further comprising: a first driving circuit that drives a pixel array for adjusting transparency/light-emission included in the light-source light/ambient light adjuster; a second driving circuit that drives a pixel array for adjusting transmittance included in the transmittance adjuster; a first display control circuit that controls the first driving circuit; and a second display control circuit that controls the second driving circuit, wherein the image signal includes the transparent/light-emitting pixel information for setting, for each pixel, a ratio of transmission at which the ambient light and the light-source light transmit through the pixel array for adjusting transparency/light-emission, and the transmittance pixel information for setting, for each pixel, a transmittance of the pixel array for adjusting transmittance, the first driving circuit adjusts, for each pixel, a ratio between the light-source light and the ambient light which transmit through the pixel array for adjusting transparency/light-emission, based on the transparent/light-emitting pixel information, and the second driving circuit adjusts, for each pixel, transmittances of the light-source light and the ambient light which transmit through the pixel array for adjusting transmittance, based on the transmittance pixel information.
The image display device from the previous description has a first driver circuit that controls the pixel array in the light/ambient light adjuster for transparency/light emission. A second driver circuit controls the pixel array in the transmittance adjuster. A first display control circuit manages the first driver, and a second display control circuit manages the second driver. The image signal includes pixel information defining the transmission ratio of ambient and source light for each pixel, and also transmittance information that sets the transmittance of each pixel in the transmittance adjuster. The first driver adjusts the ratio of source and ambient light per pixel, and the second driver adjusts the transmittance of light per pixel in the transmittance adjuster. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light with polarization along its reflection axis. The light source is located between the light/ambient light adjuster and the polarization plate, or close by, and shines polarized source light (perpendicular to a specific polarization) onto the polarization plate.
8. The image display device according to claim 7 , wherein the image signal further includes at least any one of first display pixel information for setting gradation information for displaying an image which is gradation-displayed in each pixel of the pixel array for adjusting transparency/light-emission, and second display pixel information for setting gradation information for displaying an image which is gradation-displayed in each pixel of the pixel array for adjusting transmittance.
The image display device from the previous description enhances image display by including first display pixel information for setting gradation information for displaying an image gradation-displayed in each pixel of the pixel array for adjusting transparency/light-emission, and second display pixel information for setting gradation information for displaying an image gradation-displayed in each pixel of the pixel array for adjusting transmittance. The pixel array for adjusting transparency/light-emission adjusts the ratio of source and ambient light per pixel based on the transparency/light-emitting pixel information, and the pixel array for adjusting transmittance adjusts the transmittance of light per pixel in the transmittance adjuster. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light with polarization along its reflection axis. The light source is located between the light/ambient light adjuster and the polarization plate, or close by, and shines polarized source light (perpendicular to a specific polarization) onto the polarization plate.
9. The image display device according to claim 7 , wherein the first driving circuit causes a plurality of pixels of the pixel array for adjusting transparency/light-emission corresponding to the plurality of pixels connected to an identical scanning signal line of the pixel array for adjusting transmittance to be in a light-emitting state, based on the transparent/light-emitting pixel information.
In the image display device from claim 7 (with a first and second driver circuit, and control circuits for pixel arrays adjusting transparency/light-emission and transmittance), the first driving circuit sets multiple pixels on the transparency/light-emission pixel array to a light-emitting state if they are connected to the same scanning signal line on the transmittance pixel array. This is based on the transparent/light-emitting pixel information. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light with polarization along its reflection axis. The light source is located between the light/ambient light adjuster and the polarization plate, or close by, and shines polarized source light (perpendicular to a specific polarization) onto the polarization plate.
10. The image display device according to claim 8 , wherein the transparent/light-emitting pixel information and the first display pixel information for setting the gradation information for displaying an image which is gradation-displayed in each pixel of the pixel array for adjusting transparency/light-emission, and the transmittance pixel information and the second display pixel information for setting the gradation information for displaying an image which is gradation-displayed in each pixel of the pixel array for adjusting transmittance are respectively input to the first and second display control circuits from outside, as a first image signal and a second image signal.
The image display device from claim 8 (having gradation image display in each pixel of the pixel array) receives first image signal and a second image signal to control pixel array. The transparent/light-emitting pixel information and the first display pixel information are combined as the first image signal. The transmittance pixel information and the second display pixel information are combined as the second image signal. The first and second display control circuits receive each image signal for displaying an image gradation-displayed in each pixel of the pixel array. The pixel array for adjusting transparency/light-emission adjusts the ratio of source and ambient light per pixel based on the transparency/light-emitting pixel information, and the pixel array for adjusting transmittance adjusts the transmittance of light per pixel in the transmittance adjuster. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light with polarization along its reflection axis. The light source is located between the light/ambient light adjuster and the polarization plate, or close by, and shines polarized source light (perpendicular to a specific polarization) onto the polarization plate.
11. The image display device according to claim 7 , wherein the image signal includes the transparent/light-emitting pixel information, the transmittance pixel information, first display pixel information, and second display pixel information, and after the image signal is divided into a first image signal which includes the transparent/light-emitting pixel information and the first display pixel information and a second image signal which includes the transmittance pixel information and the second display pixel information, the first image signal is input to the first display control circuit, and the second image signal is input to the second display control circuit.
The image display device from claim 7 (having a first and second driver circuit and first and second display control circuits) receives a combined image signal that's then divided into two parts: a first image signal (transparent/light-emitting pixel and first display pixel data) and a second image signal (transmittance pixel and second display pixel data). The first image signal is sent to the first control circuit, and the second image signal goes to the second control circuit. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light with polarization along its reflection axis. The light source is located between the light/ambient light adjuster and the polarization plate, or close by, and shines polarized source light (perpendicular to a specific polarization) onto the polarization plate.
12. The image display device according to claim 1 , further comprising: a transmittance adjuster which is disposed close to the front surface side of the light-source light/ambient light adjuster, and adjusts transmittances of the light-source light and the ambient light transmitted through the light-source light/ambient light adjuster; a first absorption-type polarization plate that is disposed close to a front surface side of the transmittance adjuster; and a second absorption-type polarization plate that is disposed close to a front surface side of the light-source light/ambient light adjuster, and transmits at least any one of the light-source light and the ambient light transmitted through the light-source light/ambient light adjuster, wherein the polarization component selector includes a reflection-type polarization plate that transmits polarization components of the ambient light and the light-source light which have an identical polarization direction as a transmission axis direction, and reflects polarization components having an identical polarization direction as a reflection axis direction, the light-source light irradiator is disposed in a space interposed between the transmittance adjuster and the second absorption-type polarization plate or near the space, and irradiates the light-source light toward the second absorption-type polarization plate, the light-source light/ambient light adjuster controls polarization directions of the light-source light and the ambient light such that at least any one of polarization components of the light-source light which is irradiated from the light-source light irradiator and is reflected by the reflection-type polarization plate, and polarization components of the ambient light which are incident from the rear surface side of the display and are perpendicular to the polarization components of the light-source light are extracted, or controls the polarization direction of the light-source light emitted from the light-source light irradiator such that the light-source light is extracted to the rear surface side of the display, and the transmittance adjuster transmits polarization components of at least any one of the light-source light and the ambient light to the front surface side of the display by adjusting, for each pixel, transmittances of pixels through which the polarization components of the light-source light and the ambient light extracted by the light-source light/ambient light adjustor transmit, based on transmittance pixel information.
The image display device from the first description incorporates a transmittance adjuster near the front of the light/ambient light adjuster, regulating the light that passes. It also includes a first absorption polarization plate near the front of the transmittance adjuster and a second one near the front of the light/ambient light adjuster, which transmits at least some of the light. The polarization component selector uses a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light polarized along its reflection axis. The light source is situated between the transmittance adjuster and second polarization plate, shining light onto the second plate. The light/ambient light adjuster controls polarization of the source and ambient light, extracting either polarized source light (reflected by the polarization plate) or polarized ambient light (perpendicular to the source light). Alternatively, the light source emits light polarized to be extracted towards the display's rear. The transmittance adjuster then adjusts the amount of light passing through each pixel, sending at least some light to the front, based on pixel transmittance information.
13. The image display device according to claim 12 , further comprising: a first driving circuit that drives a pixel array for adjusting transparency/light-emission included in the light-source light/ambient light adjuster; a second driving circuit that drives a pixel array for adjusting transmittance included in the transmittance adjuster; a first display control circuit that controls the first driving circuit; a second display control circuit that controls the second driving circuit; and a switching circuit that is connected to the first display control circuit, selects any one of a first image signal and a second image signal included in the image signal if the first and second image signals are input, and outputs the selected signal to the first display control circuit, wherein the first image signal includes the transparent/light-emitting pixel information for setting, for each pixel, a ratio of transmission at which the ambient light and the light-source light transmit through the pixel array for adjusting transparency/light-emission, and first display pixel information for setting gradation information for displaying an image with gradations, and the second image signal includes the transmittance pixel information for setting, for each pixel, a ratio of transmission at which the ambient light and the light-source light transmit through the pixel array for adjusting transmittance, and second display pixel information for setting gradation information for displaying an image with gradations, if the second image signal is applied to the second display control circuit and the first image signal selected by the switching circuit is applied to the first display control circuit, the first driving circuit drives the pixel array for adjusting transparency/light-emission such that a transmission ratio between the ambient light and the light-source light is adjusted for each pixel and the ambient light and the light-source light transmitted through the pixel array for adjusting transparency/light-emission are respectively irradiated to corresponding pixels of the pixel array for adjusting transmittance, based on the first image signal, and the second driving circuit drives the pixel array for adjusting transmittance such that the ambient light and the light-source light irradiated from the pixel array for adjusting transparency/light-emission transmit at transmittances set for each pixel, based on the second image signal, and if the second image signal is applied to the second display control circuit and the second image signal selected by the switching circuit is applied to the first display control circuit, the first driving circuit drives the pixel array for adjusting transparency/light-emission such that an image corresponding to the second image signal is displayed, and the second driving circuit drives the pixel array for adjusting transmittance such that an image corresponding to the second image signal is displayed.
The image display device builds upon the structure of the previous description, including a first and second driver circuit and first and second display control circuits. It adds a switching circuit connected to the first display control circuit to select between a first and second image signal from the image signal. The first image signal carries information about transparency/light-emission ratios for each pixel in the first array, plus gradation information. The second signal carries information on the transmittance of each pixel in the second array, plus gradation information. If first image signal is selected, the first array adjusts light/transmission ratios and sends light to corresponding pixels on the second array. The second array then transmits this light at set transmittances. If the second image signal is selected, both arrays display images based on that signal. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light polarized along its reflection axis. The light source is located between the transmittance adjuster and second polarization plate, shining light onto the second plate.
14. The image display device according to claim 13 , wherein the first image signal is input to the switching circuit from outside, and the second image signal is input to the switching circuit and the second display control circuit from outside.
The image display device from claim 13 (having driver circuits, control circuits and a switching circuit) receives the first and second image signals externally. The switching circuit and the second display control circuit receive the second image signal, while the first image signal is sent only to the switching circuit. The switching circuit then chooses which signal gets passed to the first display control. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light polarized along its reflection axis. The light source is located between the transmittance adjuster and second polarization plate, shining light onto the second plate.
15. The image display device according to claim 13 , wherein, if the image signal which includes the first image signal and the second image signal is input from outside, after the image signal is divided into the first image signal and the second image signal, the first and second image signals are applied to the switching circuit, and the second image signal is applied also to the second display control circuit.
The image display device from claim 13 (having driver circuits, control circuits and a switching circuit) separates a combined image signal into a first and second image signal. Both image signals are sent to the switching circuit, while the second image signal is also sent to the second display control circuit. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector is a reflection-type polarization plate, transmitting light with the same polarization as its transmission axis and reflecting light polarized along its reflection axis. The light source is located between the transmittance adjuster and second polarization plate, shining light onto the second plate.
17. The image display device according to claim 2 , wherein the light-source light irradiator is a light guide plate provided with a plurality of reflection members on a front surface side thereof, and the reflection member is made of a transparent material having an identical refractive index as that of the light guide plate, and includes a transparent dot formed on a surface of the light guide plate, and a non-transmission member formed so as to cover the transparent dot.
In the image display device from the second description, the light source is a light guide plate with reflective components on its front. These components are made from transparent material with the same refractive index as the light guide plate. They consist of transparent dots on the surface of the plate, covered by a non-transparent material. The reflection-type polarization plate transmits ambient and source light with the same polarization direction as its transmission axis and reflects light polarized along its reflection axis. The light source is placed between the light/ambient light adjuster and the polarization plate, or close by, shining light onto the polarization plate.
18. The image display device according to claim 2 , wherein the light-source light irradiator is a light guide plate provided with a plurality of reflection members on a front surface side thereof, and the reflection member includes a groove formed on a surface of the light guide plate, and a non-transmission member formed so as to cover the groove.
In the image display device from the second description, the light source is a light guide plate with reflective components on its front. Each reflective component is a groove on the surface of the plate, covered by a non-transparent material. The reflection-type polarization plate transmits ambient and source light with the same polarization direction as its transmission axis and reflects light polarized along its reflection axis. The light source is placed between the light/ambient light adjuster and the polarization plate, or close by, shining light onto the polarization plate.
19. The image display device according to claim 1 , further comprising: a shutter which is disposed closer to the rear surface side of the display than the polarization component selector, and blocks at least a part of the ambient light incident from the rear surface side.
The image display device from the first description includes a shutter positioned behind the polarization component selector. This shutter blocks at least some of the ambient light entering from the rear. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector lets ambient light from the back pass through with a specific polarization. It also reflects source light with polarization perpendicular to the ambient light and sends both types of light to the adjuster.
20. The image display device according to claim 19 , wherein the shutter includes a third absorption-type polarization plate that transmits polarization components of the ambient light incident from the rear surface side, which have an identical direction as a transmission axis of the polarization component selector, and a pixel array for shutter capable of changing a blocking ratio of polarization components of the ambient light transmitted through the third absorption-type polarization plate.
The image display device from the previous description includes a third absorption polarization plate that transmits ambient light with the same polarization as the polarization component selector's transmission axis. It also includes a pixel array for a shutter that can change the blocking ratio of polarized ambient light. The light/ambient light adjuster includes a pixel array that changes the polarization of light for each pixel based on an external image signal, sending the desired light to the front, allowing transparent display. The polarization component selector lets ambient light from the back pass through with a specific polarization. It also reflects source light with polarization perpendicular to the ambient light and sends both types of light to the adjuster. A shutter blocks some ambient light from the rear.
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August 5, 2014
August 8, 2017
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